US3387721A - Bucket chain conveyor - Google Patents

Bucket chain conveyor Download PDF

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Publication number
US3387721A
US3387721A US525260A US52526066A US3387721A US 3387721 A US3387721 A US 3387721A US 525260 A US525260 A US 525260A US 52526066 A US52526066 A US 52526066A US 3387721 A US3387721 A US 3387721A
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US
United States
Prior art keywords
buckets
bucket
chain
sprocket
ladder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US525260A
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English (en)
Inventor
Ludwig Carl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mcdowell Wellman Engineering Co
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Mcdowell Wellman Engineering Co
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Filing date
Publication date
Application filed by Mcdowell Wellman Engineering Co filed Critical Mcdowell Wellman Engineering Co
Priority to US525260A priority Critical patent/US3387721A/en
Priority to BE689647D priority patent/BE689647A/xx
Priority to DE19661456715 priority patent/DE1456715A1/de
Priority to NL6617987A priority patent/NL6617987A/xx
Application granted granted Critical
Publication of US3387721A publication Critical patent/US3387721A/en
Assigned to DRAVO CORPORATION, A CORP. OF PA reassignment DRAVO CORPORATION, A CORP. OF PA ASSIGNS THE ENTIRE INTEREST AS OF MAY 15, 1980 Assignors: MCDOWELL-WELLMAN COMPANY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G67/00—Loading or unloading vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2814/00—Indexing codes relating to loading or unloading articles or bulk materials
    • B65G2814/03—Loading or unloading means
    • B65G2814/0397—Loading or unloading means for ships

Definitions

  • a bucket elevator unloader for bulk cargo vessels is disclosed. Lateral and transverse mobility with respect to the vessel are achieved by both dock and vessel mounted trolley embodiments.
  • An endless chain bucket elevator is journalled on a pivoting digging ladder having rigid guides and rollers to maintain the motion of the chain with buckets oriented to facilitate side ladder digging.
  • Upper sprocket mounted buckets are provided to direct the load discharge to a conveyor system for uninterrupted unloading.
  • the dock mounted embodiment incorporates a parallelogram linkage for positioning of the digging ladder.
  • the bucket chain elevator may also be vessel mounted.
  • This invention relates generally to bulk material handling systems and more particularly to bucket conveyors suitable for removing bulk material vertically from deep contains such as the holds of bulk cargo vessels.
  • Guides are provided so that immediately beneath the upper sprocket, the chain moves inwardly or toward the ascending side to a point adjacent the axis of rotation of the upper sprocket to allow the receiving conveyor to extend underneath the discharging buckets and prevent spillage of the material.
  • FIGURE 1 is a side elevational view of a Hulett type unloader modified to incorporate a bucket chain conveyor leg embodying the present invention
  • FIGURE 2 is an enlarged side elevational view of the bucket leg shown in FIGURE 1;
  • FIGURE 3 is an enlarged fragmentary elevational view of an alternative embodiment of the bucket chain conveyor leg for use with a modified Hulett type unloader;
  • FIGURE 4 is a fragmentary cross sectional view taken transverse to the longitudinal axis of a ship showing a bucket chain conveyor leg according to the present invention mounted on a gantry for adapting this invention to a self-unloading bulk cargo vessel;
  • FIGURE 5 is a side elevational view of the bucket ladder and gantry shown in FIGURE 4.
  • FIG- URE 1 shows a dock indicated generally at 10 at which is moored a bulk cargo ship 11 being unloaded by a Hulett type unloader 12, modified in accordance with the present invention.
  • the ship 11 has a hold 13 defined by the tank top 14 and sidewalls 15.
  • the Hulett type unloader is shown only generally since its structure apart from the bucket chain conveyor leg of the present invention is well known and except as described herein forms no part of this invention.
  • the unloader includes a gantry or bridge 17 which is mounted on a front rail 18 and rear rail 19 for movement along the dock ii) to allow movement lengthwise of the ship both within each hold and for movement from one hold to the next in the event that it is not desired to shift the ship for this purpose.
  • the gantry 17 has a track arrangement 21 on its upper side to support a trolley 22 which provides the necessary movement across the hold from one side of the ship to 'the other.
  • a trolley 22 mounted on the trolley 22 is an upper arm or walking beam 2: pivotally secured at 25 and having a counterweight 26 for balance purposes to offset the weight of the bucket leg on the end.
  • a lower arm or le brace 28 is also pivotally mounted at 29 on the trolley and a vertical leg frame 31 is pivotally mounted at 32 and 33 to the outer end of the walking beam 24 and the leg brace 28.
  • the trolley 22, the arms 24 and 23, and the vertical frame 31 define a parallelogram linkage to in sure that the vertical frame 31 remains in a vertical position at all times during vertical movement.
  • the vertical leg frame 31 has a depending support arm 35 extending downward from its lower end beneath the lower pivot 33 which serves to support one end of an outer conveyor 36 which operates to transport material back toward the gantry 17.
  • the conveyor 36 is supported by means of a cable 37, the other end of which is wound on a boist drum 3% so that the inner end of the conveyor 36 can be raised and lowered as required with the dllierent positions of the upper and lower arms 24 and 28 both for storage and to insure efficient transfer of the material from the outer conveyor 36 to the inner conveyor 41 which is mounted on the gantry 17.
  • the bucket chain conveyor or elevator leg of this invention is mounted on the vertical frame 31 and depends therefrom for insertion into the hold of a vessel being unloaded.
  • the vertical frame 31 has an outwardly projecting horizontal beam 44 secured adjacent its midpoint, and an angular support beam 45 extends from the lower end of the vertical frame ,31 to the outer end of the horizontal beam 44 to provide a rigid support.
  • a drive mechanism 57 which contains a drive motor and gear box is mounted on the upper side of the horizontal beam 44 and provides the final drive to the sprocket shaft 49.
  • the ladder frame 51 is mounted on a shaft coaxial with the sprocket shaft 49 and is rotatably journaled to be supported by the beam 44 and drive mechanism 47 so that the ladder frame can rotate about the axis of the sprocket shaft 49.
  • the ladder frame 51 extends downward a distance sufficient to reach the full depth of the holds of the vessel being unloaded and has a structural framework defined by a front edge or rail 52 and rear edge or rail 53 spaced apart by cross members 54.
  • the entire ladder frame 51 is caused to rotate about the axis of the sprocket shaft 49 by means of tilt cylinders 56 anchored between the ladder frame 51 and the vertical frame 31 so as to hold the ladder frame in the desired angular position.
  • the ladder frame can be tilted outward as shown in FIGURE 1 to reach the far side of the ships hold and can also be tilted inward to the vertical position and through the vertical position so that its bottom end is inward of the upper end to reach re-entrant portions or" the hold.
  • the trolley 22 is moved along the track 21 inwardly as necessary so that all portions across the hold can be reached. Movement along the length of the ship is accomplished by having the gantry 17 move along the rails 18 and 19.
  • the sprocket shaft 49 is arranged to rotatably drive an upper sprocket 58 rotatably carried on the upper end of the ladder frame 51.
  • the ladder frame carries a lower sprocket 60 mounted on a shaft 61 which in turn is supported by hearing blocks 62. It will be understood that although only one side of the ladder and bucket chain have been shown, that there are two spaced sprockets at both the upper and lower ends carryin" separate spaced parallel chains with the buckets extending transversely between the chains.
  • the ladder frame carries a support plate 63 having a slot therein to slidably receive the bearing block 62 for vertical movement.
  • a tensioning unit 64 is arranged to position the bearing block. so as to provide proper operating tension in the bucket chain while allowing a certain amount of upward yield in the event that a bucket or the chain should accidentally strike the bottom of the hold to prevent damage by allowing the lower sprocket to shift upwardly in a yielding manner.
  • the bucket chains 66 are mounted to extend in an endless manner around the upper and lower sprockets 53 and 6t and are spaced apart in parallel fashion, as better seen in FIGURE 4, so as to carry buckets 70 extending transversely between the chains.
  • the chains are made up of links 67 carrying rollers 63 at each pivotal connection with the rollers being arranged to ride in guide tracks 'on the front and rear edges 52 and 53 of the chain to properly position the chain and prevent lateral movement.
  • the rear edge 53 is arranged so that on the descending side the chain after passing over the upper sprocket moves inwardly to a point adjacent a center line extending between the axes of rotation of the upper and lower sprockets.
  • This arrangement allows the outer conveyor 36 to extend beneath the buckets when they are in dumping position, when the bucket ladder frame is in the vertical position or even when tilted inwardly so that the lower sprocket is inward of a vertical line from the upper sprocket.
  • the attitude or angular orientation of the bucket is determined by the attitude of the link and as the links pass around the sprockets, the buckets will pass through a change in angular position corresponding to the change in angular position of the link. Normally, this would result the buckets, if full or nearly so, tending to discharge the ma: terial they contain when they approach the top center position of the upper sprocket 58.
  • the upper sprockets 58 carry a plurality of fixed buckets or scoops 75 mounted between the sprockets and having a width substantially equal to the width of the chain buckets 70. These sprocket buckets 75 are rigidly secured to the upper sprockets 58 in such a manner that they extend radially between the adjacent chain buckets as the chains pass around the upper sprockets.
  • the sprocket buckets 75 allow the chain buckets to be rigidly secured to the links of the bucket chain for efiective digging and allow the digging to be carried on in such a manner that the chain buckets can be almost completely filled yet discharge in a controlled manner to prevent the spilling which would result from premature tilting of the chain buckt '70 at the top center in the absence of the sprocket buckets 75.
  • a deflecting plate 77 is mounted on the vertical frame 31 to deflect the material discharged from sprocket buckets vertically downward into an angularly disposed chute 78 from which the material passes onto a roller conveyor 80 secured to the lower end of the vertical frame 31 and arranged to direct the material downwardly and rearwardly onto the belt 39 of the outer conveyor 36.
  • the roller conveyor 80 has a plurality of parallel driven rollers 81 having their axes spaced apart by a distance only slightly greater than their diameter so that bulk material of pellet or chunk size is conveyed along the rollers and will not pass through the openings in the roller conveyor.
  • FIGURE 3 An alternative mounting for the bucket ladder is shown in FIGURE 3 in which a vertical frame 85 is mounted between the upper and lower arms 24 and 28 in the same manner as the vertical frame 31. At its lower end, the vertical frame 85 has a depending arm 87 arranged to support the outer conveyor 35 in the same manner as the previously described embodiment.
  • the vertical frame 85 at its lower end opposite the pivotal attachment point for the lower arm .28 has a horizontally extending arm 88 carrying a pivot shaft 89 which supports the bucket ladder frame 90 at a point adjacent the reverse bend in the chain a distance below the upper sprocket.
  • the ladder frame 90 and the remaining portions of the bucket ladder are identical with that of the embodiment shown in FIGURES 1 and 2, and suitable tilt cylinders (not shown) may be employed between the frame 99 and the vertical frame 85 for effecting the tilting movement of the bucket ladder.
  • a support arm 92 projects rearwardly and downwardly from the ladder frame 919 to pivotally support the outer end of a roll conveyor 94 constructed in a manner similar to the roller conveyor 80.
  • This roller conveyor 94 since it is attached to the ladder frame at a point above the pivotal support to the ladder frame will then tend to move relative to the vertical frame 85 and conveyor 36 as the ladder pivots about the shaft 89. Accordingly, the inner end of conveyor 94 is slidably mounted on a track 95 carried on the outer conveyor 36 to accommodate this movement.
  • roller conveyor 94 Since the roller conveyor 94 is carried directly by the ladder frame, it may be mounted slightly closer to the sprocket buckets so that no deflecting plates are necessary. Accordingly, as the material is discharged from the sprocket buckets it falls directly onto the roller conveyor 94 from which it passes directly to the outer conveyor 36.
  • FIGURES 4 and 5 Another application of the bucket chain ladder of this invention using the bucket chain ladders in tandem is shown in FIGURES 4 and 5 as applied to a self-unloading ship.
  • the ship 97 is of the usual construction having a plurality of holds 98 and a pair of rails 99 are mounted on the top deck 100 of the ship extending along the length of the ship on each side of the holds.
  • a gantry 101 is mounted on the rails 99 by means of sets of trucks 102. which may be self-propelled, and from which extend upwardly a pair of spaced side frames 103.
  • the side frames 103 are connected together at their upper ends by a pair of cross beams 105 having tracks 106 along their upper edge.
  • a trolley 107 is supported on axles 110 having wheels 109 running on tracks 106 so that the trolley 107 can traverse the vessel from side to side across the hold so that this movement in combination with the movement of the gantry 101 along the deck rails 99 allow the buckets on the bucket ladder to reach all portions of the hold.
  • the trolley 107 has a pair of side frames 112 beneath axles 110 from the underside of which hang bearing brackets 114. These bearing brackets in turn support a cross axle or shaft 115 on which the upper sprockets 116 of the bucket ladder are carried.
  • a ladder frame 118 is also supported to rotate about the axis of the shaft 115 and tilting movement is provided by the tilt cylinders 119 which are arranged to have a long stroke so that the ladder can be rotated through an angle in excess of 90. This allows the ladder to be rotated somewhat forward from the position of FIGURE 5 and in the other direction upward to a generally horizontal position necessary to move the ladder above the coaming as it is moved from one hatch opening to the next.
  • the ladder frame carries lower sprockets 121 mounted in the manner of the lower sprockets of the ladder shown in FIGURES l and 2 to carry the endless bucket chains 123 carrying the buckets 124.
  • the ladder is tandem having two complete sets of buckets with alternate spacing which serves to increase capacity as well as smooth out the load on the driving mechanism.
  • each of the bucket chains will have two chain units with the buckets extending transversely between them together with four sprockets at the top and four at the bottom, but all of the sprockets are secured to a common shaft.
  • the chains On the downward side, the chains have a reverse bend 126 which takes the buckets in adjacent a point on the line between the axes of rotation of the upper and lower sprockets, and the upper sprockets carry sprocket buckets 127 cooperating with the chain buckets 12.4 to control the discharge of material in the manner previously mentioned.
  • T he reverse bend 126 allows the bulk material to be dumped directly downward, even if the ladder is rotated slightly clockwise from the position shown in FIGURE 5 to allow the materials to be dumped directly onto a transverse conveyor 129 carried by the gantry and discharging onto a longitudinal conveyor 131 mounted on the top deck 100 of the ship which may be used to move the material to an unloading boom or the like.
  • deflectors and shields may be used to control the dischage of the material from the buckets 124 and 127 onto the conveyor 129 and these deflectors may be either movable with the trolley 107 or fixed on the gantry 101.
  • An unloader for bulk cargo vessels comprising a supporting frame, a trolley mounted on said frame for movement transverse of a ship being unloaded, upper and lower arms pivotally mounted on said trolley, a vertical frame pivotally secured to the outer ends of said upper and lower arms whereby said upper and lower arms and said trolley and said vertical frame form a parallelogram linkage to allow vertical movement of said vertical frame while retaining the vertical alignment thereof, a rigid bucket elevator ladder frame pivotally secured at its upper end to said vertical frame and arranged to extend downward into the hold of a ship being unloaded, upper and lower sprockets rotatably mounted on said ladder frame, drive means to rotate one of said sprockets, endless chain means forming a closed loop around said sprockets and including buckets carried by said chain means, guide means on said ladder frame below said upper sprocket to deflect said chain in a reverse bend inwardly to a point adjacent a line joining the axes of rotation of said upper and lower sprockets so that said chain means is in
  • a bucket elevator adapted to remove bulk material from a pile to elevate it in a substantially vertical direction and discharge it in a generally downward direction
  • an elongated rigid ladder frame including a pair of rigid guide rails supported on opposite sidcs of the ladder support means pivotally mounting said ladder for rotational movement at a point adjacent the upper end of the ladder frame, upper and lower sprockets rotatably mounted on said ladder frame, drive means to rotate one of said sprockets, endless chain means forming a closed loop around said sprockets and including buckets carried by said chain means on bucket links having a pair of rollers journaled therein to roll on said guide rails and to fix the relative position of said bucket with respect to said guide rails in a predetermined orientation so as to provide positive control over said buckets during digging and lifting operations, and guide means on said ladder frame below said upper sprocket to deflect said chain in a reverse bend inwardly to a point adjacent a line joining the axes of rotation of said upper and lower
  • sprocket buckets carried by said upper sprocket and arranged to cooperate with the buckets on said endless chain means to receive material discharged from said chain buckets at the top position on said upper sprocket, said sprocket buckets being constructed and arranged to prevent further discharge of the material until the buckets have rotated to a position on said upper sprocket where said sprocket bucket serves to direct the material discharged from said chain buckets in a generally downward position.
  • An unloader for bulk cargo vessels comprising a supporting frame, a trolley mounted on said frame for movement transverse of a ship being unloaded, upper and lower arms pivotally mounted on said trolley, 21 vertical frame pivotally secured to the outer ends of said upper 79 and lower arms whereby said upper and lower arms and said trolley and said vertical frame form a parallelogram linkage to allow vertical movement of said vertical frame while maintaining the vertical alignment thereof, a rigid bucket elevator ladder frame, support mean for said ladder rams, upper and lower sprockets rotatably mounted on said ladder frame, drive means to rotate one of said sprockets, endless chain means forming a closed loop around said sprockets and including buckets carried by said chain means, and means on said ladder frame between said upper and lower sprockets to deflect said chain inwardly to allow said buckets to discharge downwardly as they pass over the top of said upper sprocket said ladder is in a substantially vertically position.
  • said means on said ladder frame below said upper sprockets comprise guide rail means on said ladder to deflect said chain in a reverse bend inwardly to a point adjacent a line joining the axis of rotation of said upper and lower sprockets so that said chain means is in engagement with said upper sprocket for more than 133 of the periphery of said upper sprocket to allow said buckets to discharge downwardly as they pass over the top or said upper sprocket without interference from the precedin buckets.
  • An unloader for bulk cargo including conveyor means carried on said arms to extend below said reverse bend to receive the material discharged from said buckets and to convey it toward said trolley.
  • An unloader as s:t forth in claim 3 including con veyor means operable in the plane of movement of said endless chain means and extending beneath said upper sprockets at said reverse bend to receive material discharged from said buckets.
  • said conveyor means includes a roller conveyor extending downwardly ant. from said upper sprocket and a belt conveyor adaptzd to receive material of said roller conveyor and extending beneath said roller conveyor for substantially the full length of said roller conveyor.
  • An unloader as set forth in claim 3 including sprocket buckets carried by saidupper sprocket and arranged to cooperate with the buckets on said endless chain means to receive material discharged from said chain buckets at the top position on upper sprocket, said sprocket buckets being constructed and arranged to prevent further discharge of the material until the buckets have rotated to a downward position on said upper sprocket where said sprocket buckets serve to direct the material discharged from said chain buckets in a generally downward direction.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ship Loading And Unloading (AREA)
US525260A 1966-02-04 1966-02-04 Bucket chain conveyor Expired - Lifetime US3387721A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US525260A US3387721A (en) 1966-02-04 1966-02-04 Bucket chain conveyor
BE689647D BE689647A (en)) 1966-02-04 1966-11-14
DE19661456715 DE1456715A1 (de) 1966-02-04 1966-11-18 Eimerkettenfoerderer
NL6617987A NL6617987A (en)) 1966-02-04 1966-12-22

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US525260A US3387721A (en) 1966-02-04 1966-02-04 Bucket chain conveyor

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US3387721A true US3387721A (en) 1968-06-11

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DE (1) DE1456715A1 (en))
NL (1) NL6617987A (en))

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519146A (en) * 1967-01-31 1970-07-07 Geschafts Und Ind B Moeller & Jib crane construction having a vertical conveyer
US3640376A (en) * 1970-03-12 1972-02-08 Pohlig Heckel Bleichert Unloader for bulk material in which a chain bucket elevator constitutes the receiving and elevating apparatus
US3756375A (en) * 1971-10-13 1973-09-04 Dravo Corp Material handling apparatus
US3819065A (en) * 1969-06-07 1974-06-25 Ishikawajima Harima Heavy Ind Vessel unloader
US3847270A (en) * 1971-10-13 1974-11-12 Dravo Corp Material digging and transporting apparatus
US3847290A (en) * 1972-01-12 1974-11-12 Borg Warner Canada Ltd Bulk ship unloader
US3917051A (en) * 1973-10-05 1975-11-04 Orenstein & Koppel Ag Unloading device with a vertical conveyor
JPS5465977A (en) * 1977-11-04 1979-05-28 Sumitomo Heavy Ind Ltd Baffer for bucket elevator type unloader against ship
US4379672A (en) * 1980-05-12 1983-04-12 Hunter Roy D Combination handling and conveying apparatus
US4571145A (en) * 1980-05-12 1986-02-18 Hunter Roy D Combination handling and conveying apparatus
WO1992016408A1 (en) * 1991-03-13 1992-10-01 Harrison Seymour T Improved digging chain continuous bulk unloader/reclaimer
US20090188331A1 (en) * 2008-01-24 2009-07-30 Ebm Mill & Elevator Supply Inc. Belt conveying tension measuring system
US20090255348A1 (en) * 2008-01-24 2009-10-15 Ebm Properties Inc. Belt conveying tension measuring system
US20100020914A1 (en) * 2007-07-13 2010-01-28 Jack Toshio Matsumoto Reactor servicing platform
US20150367917A1 (en) * 2012-12-11 2015-12-24 Nautilus Minerals Pacific Pty Production Support and Storage Vessel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150562A1 (de) * 1981-12-21 1983-06-30 PHB Weserhütte AG, 5000 Köln Fahrbarer schiffsentlader zur kontinuierlichen entnahme von schuettgut
DE3334399A1 (de) * 1983-09-23 1985-04-11 PHB Weserhütte AG, 5000 Köln Fahrbarer kontinuierlich arbeitender schiffsentlader
DE4311082A1 (de) * 1993-04-03 1994-10-06 Pwh Anlagen & Systeme Gmbh Schiffsent- oder -belader

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1101438A (en) * 1913-12-08 1914-06-23 Henry W Hildebrand Load-transferring apparatus.
US1166671A (en) * 1914-12-18 1916-01-04 Samuel B Goff Water-elevating apparatus.
US1357919A (en) * 1919-03-26 1920-11-02 George Sizer Bucket elevator
GB182636A (en) * 1921-05-20 1922-07-13 John Donaldson Apparatus for handling bulk cargo in ships' holds and for like purposes
US3091353A (en) * 1959-09-23 1963-05-28 Allard Pierre Jean-Ma Theodore Retractable unloader
US3144142A (en) * 1962-10-01 1964-08-11 Wallace Systems Inc W J Self-unloading cargo ship
NL6403987A (en)) * 1964-02-04 1965-08-05

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1101438A (en) * 1913-12-08 1914-06-23 Henry W Hildebrand Load-transferring apparatus.
US1166671A (en) * 1914-12-18 1916-01-04 Samuel B Goff Water-elevating apparatus.
US1357919A (en) * 1919-03-26 1920-11-02 George Sizer Bucket elevator
GB182636A (en) * 1921-05-20 1922-07-13 John Donaldson Apparatus for handling bulk cargo in ships' holds and for like purposes
US3091353A (en) * 1959-09-23 1963-05-28 Allard Pierre Jean-Ma Theodore Retractable unloader
US3144142A (en) * 1962-10-01 1964-08-11 Wallace Systems Inc W J Self-unloading cargo ship
NL6403987A (en)) * 1964-02-04 1965-08-05

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519146A (en) * 1967-01-31 1970-07-07 Geschafts Und Ind B Moeller & Jib crane construction having a vertical conveyer
US3819065A (en) * 1969-06-07 1974-06-25 Ishikawajima Harima Heavy Ind Vessel unloader
US3640376A (en) * 1970-03-12 1972-02-08 Pohlig Heckel Bleichert Unloader for bulk material in which a chain bucket elevator constitutes the receiving and elevating apparatus
US3756375A (en) * 1971-10-13 1973-09-04 Dravo Corp Material handling apparatus
US3847270A (en) * 1971-10-13 1974-11-12 Dravo Corp Material digging and transporting apparatus
US3847290A (en) * 1972-01-12 1974-11-12 Borg Warner Canada Ltd Bulk ship unloader
US3917051A (en) * 1973-10-05 1975-11-04 Orenstein & Koppel Ag Unloading device with a vertical conveyor
JPS5465977A (en) * 1977-11-04 1979-05-28 Sumitomo Heavy Ind Ltd Baffer for bucket elevator type unloader against ship
US4379672A (en) * 1980-05-12 1983-04-12 Hunter Roy D Combination handling and conveying apparatus
US4571145A (en) * 1980-05-12 1986-02-18 Hunter Roy D Combination handling and conveying apparatus
WO1992016408A1 (en) * 1991-03-13 1992-10-01 Harrison Seymour T Improved digging chain continuous bulk unloader/reclaimer
US20100020914A1 (en) * 2007-07-13 2010-01-28 Jack Toshio Matsumoto Reactor servicing platform
US9070484B2 (en) 2007-07-13 2015-06-30 Ge-Hitachi Nuclear Energy Americas Llc Reactor servicing platform
US20090188331A1 (en) * 2008-01-24 2009-07-30 Ebm Mill & Elevator Supply Inc. Belt conveying tension measuring system
US20090255348A1 (en) * 2008-01-24 2009-10-15 Ebm Properties Inc. Belt conveying tension measuring system
US7806004B2 (en) * 2008-01-24 2010-10-05 Ebm Properties Inc. Belt conveying tension measuring system
US8024983B2 (en) 2008-01-24 2011-09-27 Ebm Properties Inc. Belt conveying tension measuring system
US20150367917A1 (en) * 2012-12-11 2015-12-24 Nautilus Minerals Pacific Pty Production Support and Storage Vessel

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Publication number Publication date
BE689647A (en)) 1967-04-14
NL6617987A (en)) 1967-08-07
DE1456715A1 (de) 1969-01-30

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